United Press International: U.S. scientists say currently scheduled water deliveries from the Colorado River are unlikely to be met if human-caused climate change reduces runoff. The Colorado River system supplies water to tens of millions of people and millions of acres of farmland, and has never experienced a delivery shortage. But scientists at the Scripps Institution of Oceangraphy at the University of California-San Diego say if human-caused climate change continues to make the region drier, scheduled …